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gimp/app/tools/gimpaligntool.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "config/gimpdisplayconfig.h"
#include "core/gimp.h"
#include "core/gimpguide.h"
#include "core/gimpimage.h"
#include "core/gimpimage-arrange.h"
#include "core/gimpimage-pick-item.h"
#include "core/gimpimage-undo.h"
#include "core/gimplayer.h"
#include "core/gimppickable.h"
#include "core/gimppickable-auto-shrink.h"
#include "vectors/gimpvectors.h"
#include "widgets/gimphelp-ids.h"
#include "widgets/gimpwidgets-utils.h"
#include "display/gimpcanvasitem.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplayshell.h"
#include "display/gimpdisplayshell-appearance.h"
#include "gimpalignoptions.h"
#include "gimpaligntool.h"
#include "gimptoolcontrol.h"
#include "gimp-intl.h"
#define EPSILON 3 /* move distance after which we do a box-select */
/* local function prototypes */
static void gimp_align_tool_constructed (GObject *object);
static void gimp_align_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *display);
static void gimp_align_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display);
static void gimp_align_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display);
static void gimp_align_tool_motion (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display);
static gboolean gimp_align_tool_key_press (GimpTool *tool,
GdkEventKey *kevent,
GimpDisplay *display);
static void gimp_align_tool_oper_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display);
static void gimp_align_tool_status_update (GimpTool *tool,
GimpDisplay *display,
GdkModifierType state,
gboolean proximity);
static void gimp_align_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display);
const gchar * gimp_align_tool_can_undo (GimpTool *tool,
GimpDisplay *display);
static gboolean gimp_align_tool_undo (GimpTool *tool,
GimpDisplay *display);
static void gimp_align_tool_draw (GimpDrawTool *draw_tool);
static void gimp_align_tool_redraw (GimpAlignTool *align_tool);
static void gimp_align_tool_align (GimpAlignTool *align_tool,
GimpAlignmentType align_type);
static gint gimp_align_tool_undo_idle (gpointer data);
static void gimp_align_tool_display_changed (GimpContext *context,
GimpDisplay *display,
GimpAlignTool *align_tool);
G_DEFINE_TYPE (GimpAlignTool, gimp_align_tool, GIMP_TYPE_DRAW_TOOL)
#define parent_class gimp_align_tool_parent_class
void
gimp_align_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_ALIGN_TOOL,
GIMP_TYPE_ALIGN_OPTIONS,
gimp_align_options_gui,
0,
"gimp-align-tool",
_("Align and Distribute"),
_("Alignment Tool: Align or arrange layers and other objects"),
N_("_Align and Distribute"), "Q",
NULL, GIMP_HELP_TOOL_ALIGN,
GIMP_ICON_TOOL_ALIGN,
data);
}
static void
gimp_align_tool_class_init (GimpAlignToolClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpDrawToolClass *draw_tool_class = GIMP_DRAW_TOOL_CLASS (klass);
object_class->constructed = gimp_align_tool_constructed;
tool_class->control = gimp_align_tool_control;
tool_class->button_press = gimp_align_tool_button_press;
tool_class->button_release = gimp_align_tool_button_release;
tool_class->motion = gimp_align_tool_motion;
tool_class->key_press = gimp_align_tool_key_press;
tool_class->oper_update = gimp_align_tool_oper_update;
tool_class->cursor_update = gimp_align_tool_cursor_update;
tool_class->can_undo = gimp_align_tool_can_undo;
tool_class->undo = gimp_align_tool_undo;
draw_tool_class->draw = gimp_align_tool_draw;
}
static void
gimp_align_tool_init (GimpAlignTool *align_tool)
{
GimpTool *tool = GIMP_TOOL (align_tool);
gimp_tool_control_set_snap_to (tool->control, FALSE);
gimp_tool_control_set_precision (tool->control,
GIMP_CURSOR_PRECISION_PIXEL_BORDER);
gimp_tool_control_set_tool_cursor (tool->control, GIMP_TOOL_CURSOR_MOVE);
align_tool->function = ALIGN_TOOL_REF_IDLE;
}
static void
gimp_align_tool_constructed (GObject *object)
{
GimpAlignTool *align_tool = GIMP_ALIGN_TOOL (object);
GimpAlignOptions *options;
G_OBJECT_CLASS (parent_class)->constructed (object);
options = GIMP_ALIGN_TOOL_GET_OPTIONS (align_tool);
g_signal_connect_object (options, "align-button-clicked",
G_CALLBACK (gimp_align_tool_align),
align_tool, G_CONNECT_SWAPPED);
g_signal_connect_object (options, "notify::align-reference",
G_CALLBACK (gimp_align_tool_redraw),
align_tool, G_CONNECT_SWAPPED);
g_signal_connect_object (options, "notify::align-contents",
G_CALLBACK (gimp_align_tool_redraw),
align_tool, G_CONNECT_SWAPPED);
g_signal_connect_object (gimp_get_user_context (GIMP_CONTEXT (options)->gimp),
"display-changed",
G_CALLBACK (gimp_align_tool_display_changed),
align_tool, 0);
}
static void
gimp_align_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *display)
{
switch (action)
{
case GIMP_TOOL_ACTION_PAUSE:
case GIMP_TOOL_ACTION_RESUME:
break;
case GIMP_TOOL_ACTION_HALT:
break;
case GIMP_TOOL_ACTION_COMMIT:
break;
}
GIMP_TOOL_CLASS (parent_class)->control (tool, action, display);
}
static void
gimp_align_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display)
{
GimpAlignTool *align_tool = GIMP_ALIGN_TOOL (tool);
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
/* If the tool was being used in another image... reset it */
if (display != tool->display)
gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, display);
tool->display = display;
gimp_tool_control_activate (tool->control);
align_tool->x2 = align_tool->x1 = coords->x;
align_tool->y2 = align_tool->y1 = coords->y;
if (! gimp_draw_tool_is_active (GIMP_DRAW_TOOL (tool)))
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), display);
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
/* some rather complex logic here. If the user clicks without modifiers,
* then we start a new list, and use the first object in it as reference.
* If the user clicks using Shift, or draws a rubber-band box, then
* we add objects to the list, but do not specify which one should
* be used as reference.
*/
static void
gimp_align_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display)
{
GimpAlignTool *align_tool = GIMP_ALIGN_TOOL (tool);
GimpAlignOptions *options = GIMP_ALIGN_TOOL_GET_OPTIONS (tool);
GimpDisplayShell *shell = gimp_display_get_shell (display);
GimpImage *image = gimp_display_get_image (display);
GdkModifierType extend_mask;
extend_mask = gimp_get_extend_selection_mask ();
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
gimp_tool_control_halt (tool->control);
if (release_type == GIMP_BUTTON_RELEASE_CANCEL)
{
align_tool->x2 = align_tool->x1;
align_tool->y2 = align_tool->y1;
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
return;
}
if (state & GDK_MOD1_MASK)
{
GimpGuide *guide = NULL;
if (gimp_display_shell_get_show_guides (shell))
{
gint snap_distance = display->config->snap_distance;
guide = gimp_image_pick_guide (image,
coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance));
}
gimp_align_options_pick_guide (options, guide, (gboolean) state & extend_mask);
}
else
{
GObject *object = NULL;
/* Check if a layer is fully included in the rubber-band rectangle.
* Don't verify for too small rectangles.
*/
/* FIXME: look for vectors too */
if (hypot (coords->x - align_tool->x1,
coords->y - align_tool->y1) > EPSILON)
{
gint X0 = MIN (coords->x, align_tool->x1);
gint X1 = MAX (coords->x, align_tool->x1);
gint Y0 = MIN (coords->y, align_tool->y1);
gint Y1 = MAX (coords->y, align_tool->y1);
GList *all_layers;
GList *list;
all_layers = gimp_image_get_layer_list (image);
for (list = all_layers; list; list = g_list_next (list))
{
GimpLayer *layer = list->data;
gint x0, y0, x1, y1;
if (! gimp_item_get_visible (GIMP_ITEM (layer)))
continue;
gimp_item_get_offset (GIMP_ITEM (layer), &x0, &y0);
x1 = x0 + gimp_item_get_width (GIMP_ITEM (layer));
y1 = y0 + gimp_item_get_height (GIMP_ITEM (layer));
if (x0 < X0 || y0 < Y0 || x1 > X1 || y1 > Y1)
continue;
object = G_OBJECT (layer);
break;
}
g_list_free (all_layers);
}
if (object == NULL)
{
GimpVectors *vectors;
GimpGuide *guide;
GimpLayer *layer;
GObject *previously_picked;
gint snap_distance = display->config->snap_distance;
previously_picked = gimp_align_options_get_reference (options, FALSE);
if ((vectors = gimp_image_pick_vectors (image,
coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance))))
{
object = G_OBJECT (vectors);
}
else if (gimp_display_shell_get_show_guides (shell) &&
(guide = gimp_image_pick_guide (image,
coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance))))
{
object = G_OBJECT (guide);
}
else if ((layer = gimp_image_pick_layer (image, coords->x, coords->y,
previously_picked && GIMP_IS_LAYER (previously_picked)? GIMP_LAYER (previously_picked) : NULL)))
{
object = G_OBJECT (layer);
}
}
if (object)
gimp_align_options_pick_reference (options, object);
}
align_tool->x2 = align_tool->x1;
align_tool->y2 = align_tool->y1;
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
static void
gimp_align_tool_motion (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display)
{
GimpAlignTool *align_tool = GIMP_ALIGN_TOOL (tool);
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
align_tool->x2 = coords->x;
align_tool->y2 = coords->y;
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
static gboolean
gimp_align_tool_key_press (GimpTool *tool,
GdkEventKey *kevent,
GimpDisplay *display)
{
if (display == tool->display)
{
switch (kevent->keyval)
{
case GDK_KEY_Escape:
gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, display);
return TRUE;
default:
break;
}
}
return FALSE;
}
static void
gimp_align_tool_oper_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display)
{
GimpAlignTool *align_tool = GIMP_ALIGN_TOOL (tool);
GimpAlignOptions *options = GIMP_ALIGN_TOOL_GET_OPTIONS (align_tool);
GimpDisplayShell *shell = gimp_display_get_shell (display);
GimpImage *image = gimp_display_get_image (display);
gint snap_distance = display->config->snap_distance;
state &= gimp_get_all_modifiers_mask ();
align_tool->function = ALIGN_TOOL_NO_ACTION;
if (gimp_image_pick_vectors (image,
coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance)))
{
if (options->align_reference == GIMP_ALIGN_REFERENCE_PICK)
align_tool->function = ALIGN_TOOL_REF_PICK_PATH;
}
else if (gimp_display_shell_get_show_guides (shell) &&
gimp_image_pick_guide (image,
coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance)))
{
if (state == (gimp_get_extend_selection_mask () | GDK_MOD1_MASK))
align_tool->function = ALIGN_TOOL_ALIGN_ADD_GUIDE;
else if (state == GDK_MOD1_MASK)
align_tool->function = ALIGN_TOOL_ALIGN_PICK_GUIDE;
else if (options->align_reference == GIMP_ALIGN_REFERENCE_PICK)
align_tool->function = ALIGN_TOOL_REF_PICK_GUIDE;
}
else if (gimp_image_pick_layer_by_bounds (image, coords->x, coords->y))
{
if (options->align_reference == GIMP_ALIGN_REFERENCE_PICK)
align_tool->function = ALIGN_TOOL_REF_PICK_LAYER;
}
else
{
if (state & GDK_MOD1_MASK)
align_tool->function = ALIGN_TOOL_ALIGN_IDLE;
else if (options->align_reference == GIMP_ALIGN_REFERENCE_PICK)
align_tool->function = ALIGN_TOOL_REF_IDLE;
}
gimp_align_tool_status_update (tool, display, state, proximity);
if (! gimp_draw_tool_is_active (GIMP_DRAW_TOOL (tool)))
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), display);
}
static void
gimp_align_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display)
{
GimpAlignTool *align_tool = GIMP_ALIGN_TOOL (tool);
GimpToolCursorType tool_cursor = GIMP_TOOL_CURSOR_NONE;
GimpCursorModifier modifier = GIMP_CURSOR_MODIFIER_NONE;
switch (align_tool->function)
{
case ALIGN_TOOL_REF_IDLE:
case ALIGN_TOOL_ALIGN_IDLE:
tool_cursor = GIMP_TOOL_CURSOR_RECT_SELECT;
break;
case ALIGN_TOOL_REF_PICK_LAYER:
tool_cursor = GIMP_TOOL_CURSOR_HAND;
break;
case ALIGN_TOOL_ALIGN_ADD_GUIDE:
modifier = GIMP_CURSOR_MODIFIER_PLUS;
case ALIGN_TOOL_REF_PICK_GUIDE:
case ALIGN_TOOL_ALIGN_PICK_GUIDE:
tool_cursor = GIMP_TOOL_CURSOR_MOVE;
break;
case ALIGN_TOOL_REF_PICK_PATH:
tool_cursor = GIMP_TOOL_CURSOR_PATHS;
break;
case ALIGN_TOOL_REF_DRAG_BOX:
case ALIGN_TOOL_NO_ACTION:
break;
}
gimp_tool_control_set_cursor (tool->control, GIMP_CURSOR_MOUSE);
gimp_tool_control_set_tool_cursor (tool->control, tool_cursor);
gimp_tool_control_set_cursor_modifier (tool->control, modifier);
GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
}
const gchar *
gimp_align_tool_can_undo (GimpTool *tool,
GimpDisplay *display)
{
return _("Arrange Objects");
}
static gboolean
gimp_align_tool_undo (GimpTool *tool,
GimpDisplay *display)
{
g_idle_add ((GSourceFunc) gimp_align_tool_undo_idle, (gpointer) tool);
return FALSE;
}
static void
gimp_align_tool_status_update (GimpTool *tool,
GimpDisplay *display,
GdkModifierType state,
gboolean proximity)
{
GimpAlignTool *align_tool = GIMP_ALIGN_TOOL (tool);
gchar *status = NULL;
GdkModifierType extend_mask;
extend_mask = gimp_get_extend_selection_mask ();
gimp_tool_pop_status (tool, display);
if (proximity)
{
switch (align_tool->function)
{
case ALIGN_TOOL_REF_IDLE:
status = g_strdup (_("Click on a layer, path or guide, "
"or Click-Drag to pick a reference"));
break;
case ALIGN_TOOL_REF_PICK_LAYER:
status = g_strdup (_("Click to pick this layer as reference"));
break;
case ALIGN_TOOL_REF_PICK_GUIDE:
status = gimp_suggest_modifiers (_("Click to pick this guide as reference"),
GDK_MOD1_MASK & ~state,
NULL, NULL, NULL);
break;
case ALIGN_TOOL_REF_PICK_PATH:
status = g_strdup (_("Click to pick this path as reference"));
break;
case ALIGN_TOOL_REF_DRAG_BOX:
break;
case ALIGN_TOOL_ALIGN_IDLE:
status = g_strdup (_("Click on a guide to add it to objects to align, "
"click anywhere else to unselect all guides"));
break;
case ALIGN_TOOL_ALIGN_PICK_GUIDE:
status = gimp_suggest_modifiers (_("Click to select this guide for alignment"),
extend_mask & ~state,
NULL, NULL, NULL);
break;
case ALIGN_TOOL_ALIGN_ADD_GUIDE:
status = g_strdup (_("Click to add this guide to the list of objects to align"));
break;
case ALIGN_TOOL_NO_ACTION:
break;
}
}
if (status)
{
gimp_tool_push_status (tool, display, "%s", status);
g_free (status);
}
}
static void
gimp_align_tool_draw (GimpDrawTool *draw_tool)
{
GimpAlignTool *align_tool = GIMP_ALIGN_TOOL (draw_tool);
GimpAlignOptions *options = GIMP_ALIGN_TOOL_GET_OPTIONS (align_tool);
GObject *reference;
GList *objects;
GList *iter;
gint x, y, w, h;
/* draw rubber-band rectangle */
x = MIN (align_tool->x2, align_tool->x1);
y = MIN (align_tool->y2, align_tool->y1);
w = MAX (align_tool->x2, align_tool->x1) - x;
h = MAX (align_tool->y2, align_tool->y1) - y;
if (w != 0 && h != 0)
gimp_draw_tool_add_rectangle (draw_tool, FALSE, x, y, w, h);
/* Draw handles on the reference object. */
reference = gimp_align_options_get_reference (options, FALSE);
if (GIMP_IS_ITEM (reference))
{
GimpItem *item = GIMP_ITEM (reference);
gint off_x, off_y;
gimp_item_bounds (item, &x, &y, &w, &h);
gimp_item_get_offset (item, &off_x, &off_y);
x += off_x;
y += off_y;
if (gimp_align_options_align_contents (options) &&
GIMP_IS_PICKABLE (reference))
{
gint shrunk_x;
gint shrunk_y;
if (gimp_pickable_auto_shrink (GIMP_PICKABLE (reference),
0, 0,
gimp_item_get_width (GIMP_ITEM (reference)),
gimp_item_get_height (GIMP_ITEM (reference)),
&shrunk_x, &shrunk_y, &w, &h) == GIMP_AUTO_SHRINK_SHRINK)
{
x += shrunk_x;
y += shrunk_y;
}
}
gimp_draw_tool_add_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
x, y,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_HANDLE_ANCHOR_NORTH_WEST);
gimp_draw_tool_add_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
x + w, y,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_HANDLE_ANCHOR_NORTH_EAST);
gimp_draw_tool_add_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
x, y + h,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_HANDLE_ANCHOR_SOUTH_WEST);
gimp_draw_tool_add_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
x + w, y + h,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_HANDLE_ANCHOR_SOUTH_EAST);
}
else if (GIMP_IS_GUIDE (reference))
{
GimpGuide *guide = GIMP_GUIDE (reference);
GimpImage *image = gimp_display_get_image (draw_tool->display);
gint x, y;
gint w, h;
switch (gimp_guide_get_orientation (guide))
{
case GIMP_ORIENTATION_VERTICAL:
x = gimp_guide_get_position (guide);
h = gimp_image_get_height (image);
gimp_draw_tool_add_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
x, h,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_HANDLE_ANCHOR_SOUTH);
gimp_draw_tool_add_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
x, 0,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_HANDLE_ANCHOR_NORTH);
break;
case GIMP_ORIENTATION_HORIZONTAL:
y = gimp_guide_get_position (guide);
w = gimp_image_get_width (image);
gimp_draw_tool_add_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
w, y,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_HANDLE_ANCHOR_EAST);
gimp_draw_tool_add_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
0, y,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_HANDLE_ANCHOR_WEST);
break;
default:
break;
}
}
else if (GIMP_IS_IMAGE (reference))
{
GimpImage *image = GIMP_IMAGE (reference);
gint width = gimp_image_get_width (image);
gint height = gimp_image_get_height (image);
gimp_draw_tool_add_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
0, 0,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_HANDLE_ANCHOR_NORTH_WEST);
gimp_draw_tool_add_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
width, 0,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_HANDLE_ANCHOR_NORTH_EAST);
gimp_draw_tool_add_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
0, height,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_HANDLE_ANCHOR_SOUTH_WEST);
gimp_draw_tool_add_handle (draw_tool, GIMP_HANDLE_FILLED_SQUARE,
width, height,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_TOOL_HANDLE_SIZE_SMALL,
GIMP_HANDLE_ANCHOR_SOUTH_EAST);
}
/* Highlight picked guides, similarly to how they are highlighted in Move
* tool.
*/
objects = gimp_align_options_get_objects (options);
for (iter = objects; iter; iter = iter->next)
{
if (GIMP_IS_GUIDE (iter->data))
{
GimpGuide *guide = iter->data;
GimpCanvasItem *item;
GimpGuideStyle style;
style = gimp_guide_get_style (guide);
item = gimp_draw_tool_add_guide (draw_tool,
gimp_guide_get_orientation (guide),
gimp_guide_get_position (guide),
style);
gimp_canvas_item_set_highlight (item, TRUE);
}
}
}
static void
gimp_align_tool_redraw (GimpAlignTool *align_tool)
{
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (align_tool);
gimp_draw_tool_pause (draw_tool);
if (! gimp_draw_tool_is_active (draw_tool) && draw_tool->display)
gimp_draw_tool_start (draw_tool, draw_tool->display);
gimp_draw_tool_resume (draw_tool);
}
static void
gimp_align_tool_align (GimpAlignTool *align_tool,
GimpAlignmentType align_type)
{
GimpAlignOptions *options = GIMP_ALIGN_TOOL_GET_OPTIONS (align_tool);
GimpImage *image;
GObject *reference_object = NULL;
GList *objects;
GList *list;
gdouble align_x = 0.0;
gdouble align_y = 0.0;
/* if nothing is selected, just return */
objects = gimp_align_options_get_objects (options);
if (! objects)
return;
image = gimp_context_get_image (gimp_get_user_context (GIMP_CONTEXT (options)->gimp));
list = objects;
if (align_type < GIMP_ARRANGE_HFILL)
{
reference_object = gimp_align_options_get_reference (options, TRUE);
if (! reference_object)
return;
}
gimp_draw_tool_pause (GIMP_DRAW_TOOL (align_tool));
gimp_align_options_get_pivot (options, &align_x, &align_y);
gimp_image_arrange_objects (image, list,
align_x, align_y,
reference_object,
align_type,
gimp_align_options_align_contents (options));
gimp_draw_tool_resume (GIMP_DRAW_TOOL (align_tool));
gimp_image_flush (image);
g_list_free (objects);
}
static gint
gimp_align_tool_undo_idle (gpointer data)
{
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (data);
GimpDisplay *display = draw_tool->display;
/* This makes sure that we properly undraw then redraw the various handles and
* highlighted guides after undoing.
*/
gimp_draw_tool_stop (draw_tool);
gimp_draw_tool_start (draw_tool, display);
return FALSE; /* remove idle */
}
static void
gimp_align_tool_display_changed (GimpContext *context,
GimpDisplay *display,
GimpAlignTool *align_tool)
{
GimpTool *tool = GIMP_TOOL (align_tool);
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (align_tool);
gimp_draw_tool_pause (draw_tool);
if (display != tool->display)
gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, display);
tool->display = display;
if (! gimp_draw_tool_is_active (draw_tool) && display)
gimp_draw_tool_start (draw_tool, display);
gimp_draw_tool_resume (draw_tool);
}
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